TY - BOOK AU - Gabisch, Gunter and Loranz, Hans-Walter AU - Loranz, Hans-Walter ; jt. auth TI - Business cycle theory; a survey of methods and concepts T2 - Lecture notes in Economics and Mathematical systems SN - 3540171886 U1 - 338.54 PY - 1987/// CY - Berlin PB - Springer-Verlag ER -